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// This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
#![allow(unused)]
use std::borrow::Cow;
use zerofrom::ZeroFrom;
use zerovec::{maps::ZeroMapKV, ule::AsULE, VarZeroVec, ZeroMap, ZeroVec};
#[derive(ZeroFrom, Copy, Clone)]
pub struct IntExample {
x: u32,
}
#[derive(ZeroFrom, Copy, Clone)]
pub struct GenericsExample<T> {
x: u32,
y: T,
}
#[derive(ZeroFrom, Copy, Clone)]
pub struct GenericsExampleWithDefault<T, U = usize> {
x: T,
y: U,
}
#[derive(ZeroFrom)]
pub struct CowExample<'a> {
x: u8,
y: &'a str,
z: Cow<'a, str>,
w: Cow<'a, [u8]>,
}
#[derive(ZeroFrom)]
pub struct ZeroVecExample<'a> {
var: VarZeroVec<'a, str>,
vec: ZeroVec<'a, u16>,
}
#[derive(ZeroFrom)]
pub struct ZeroVecExampleWithGenerics<'a, T: AsULE> {
gen: ZeroVec<'a, T>,
vec: ZeroVec<'a, u16>,
bare: T,
}
#[derive(ZeroFrom)]
pub struct HasTuples<'data> {
pub bar: (&'data str, &'data str),
}
pub fn assert_zf_tuples<'b>(x: &'b HasTuples) -> HasTuples<'b> {
HasTuples::zero_from(x)
}
pub fn assert_zf_generics<'a, 'b>(
x: &'b ZeroVecExampleWithGenerics<'a, u8>,
) -> ZeroVecExampleWithGenerics<'b, u8> {
ZeroVecExampleWithGenerics::<'b, u8>::zero_from(x)
}
#[derive(ZeroFrom)]
pub struct ZeroMapGenericExample<'a, T: for<'b> ZeroMapKV<'b> + ?Sized> {
map: ZeroMap<'a, str, T>,
}
pub fn assert_zf_map<'b>(x: &'b ZeroMapGenericExample<str>) -> ZeroMapGenericExample<'b, str> {
ZeroMapGenericExample::zero_from(x)
}
#[derive(Clone, ZeroFrom)]
pub struct CloningZF1 {
#[zerofrom(clone)] // Vec is not ZeroFrom, so it needs to be cloned
vec: Vec<u8>,
}
#[derive(Clone, ZeroFrom)]
pub struct CloningZF2<'data> {
#[zerofrom(clone)] // Cow is ZeroFrom, but we force a clone
cow: Cow<'data, str>,
}
#[derive(ZeroFrom)]
pub enum CloningZF3<'data> {
Cow(#[zerofrom(clone)] Cow<'data, str>),
}
#[derive(ZeroFrom)]
#[zerofrom(may_borrow(T))] // instead of treating T as a copy type, we want to allow zerofromming T too
pub struct GenericsThatAreAlsoZf<T> {
x: T,
y: Option<T>,
}
pub fn assert_zf_generics_may_borrow<'a, 'b>(
x: &'b GenericsThatAreAlsoZf<&'a str>,
) -> GenericsThatAreAlsoZf<&'b str> {
GenericsThatAreAlsoZf::<&'b str>::zero_from(x)
}
#[derive(ZeroFrom)]
pub struct UsesGenericsThatAreAlsoZf<'a> {
x: GenericsThatAreAlsoZf<&'a str>,
}
// Ensure it works with invariant types too
#[derive(ZeroFrom)]
pub struct UsesGenericsThatAreAlsoZfWithMap<'a> {
x: GenericsThatAreAlsoZf<ZeroMap<'a, str, str>>,
}
fn main() {}
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